Abstract: A simultaneous dual polarization radar system is disclosed repositioning critical processing components below the elevation rotary coupler to avoid radar emission pulse train corruption due to waveguide phase error introductions and to fully capitalize on the simultaneous transmission of polarized signals. A fiber optic rotational coupler is introduced to allow an improved alternate data path for data transmission from the receivers to the signal processors and to allow for transmitting reflected signal returns from the receiver subsystem located above the elevation rotary coupler to the radar system processor located below the elevation rotary coupler.

Abstract: The invention consists, generally, of a method for automatically reducing power to an electron emitting cathode by sensing an operating condition of the electron emitting cathode, calculating a condition number based upon the operating condition, comparing the condition number to a threshold value, and reducing the power to the electron emitting cathode when the condition number is greater than the threshold. The apparatus and method may be implemented upon a system having a high voltage power source, an RF tube, a control processor, and a signal processor.